贵州省核桃嫁接苗分级标准的初步研究

Preliminary Research on Grade Scales of Grafted Walnut Seedlings in Guizhou Province

以核桃嫁接苗苗高、地径、主根长、大于5 cm长Ⅰ级侧根数等性状作为分级指标,对贵州省核桃嫁接苗这4个指标的生长质量和环境条件,进行系统调查和统计学特征、回归、方差分析后,运用多元统计分析的逐步聚类法对嫁接苗进行分类。并结合贵州省苗木生产的自然生态、经营管理条件、核桃栽培要求及性状指标的统计学分析结果进行调整,从而得出贵州省核桃嫁接苗分级的合理标准。

Growth quality and environmental conditions of grafted walnut seedlings in Guizhou province were analyzed, height, basal diameter, main root length and number of the first grade of lateral roots over 5 cm taken as the grade scale indexes, by systematic investigation, regression analysis and variance analysis. And the grafted walnut seedlings were classified by k-means clustering procedure. Based on the natural ecology, management conditions and cultivation request in grafted walnut seedlings producing, and the statistics analysis results of seedling characteristic indexes, rational grade scale of grafted walnut seedlings in Guizhou province were obtained.